Halothane gene and swine performance

Area of Science:

• Animal Science
• Genetics
• Pork Production

Background:

• Understanding genetic and breed influences on pig performance is crucial for optimizing pork production.
• The halothane gene (HAL) is known to affect meat quality and muscle characteristics in pigs.

Purpose of the Study:

• To investigate the effects of different pig breeds, sex, and halothane gene genotypes on growth and carcass performance.
• To determine the contribution of the HAL-locus to variations in meat quantity and quality traits.

Main Methods:

• Evaluated 131 pigs from seven breed groups and three halothane gene genotypes (NN, Nn, nn).
• Measured growth traits, carcass performance, meat quality scores, and fat/water percentages.
• Analyzed breed, sex, and HAL genotype effects, including phenotypic correlations.

Main Results:

• Breed significantly affected all measured traits; sex affected most traits except meat scores.
• The HAL-locus explained 20-30% of meat quality variation and 1-10% of growth/quantity traits.
• Pietrain x Yorkshire pigs exhibited fast growth and good carcass quality; Pietrain crosses had more lean muscle but lower meat quality. HAL-negative (Nn) individuals showed faster growth and better meat quality than HAL-positive (nn) pigs.

Conclusions:

• Breed and halothane gene genotype are key determinants of pig growth, carcass yield, and meat quality.
• Pietrain crosses offer potential for lean meat production, but strategies are needed to improve meat quality.
• Halothane gene status significantly influences performance and meat characteristics, offering targets for breeding programs.